Corrupted Memories

You can see the progression of pwners in the scoreboard.
The first three to complete the challenge will be offered a ticket for GreHack 2018 and a sweet sweat (sic) - Edition GreHack 2018, and one of them will present (a part of) his solution
during the conference.
The first pwner to complete the challenge will have a Benefactor ticket, which includes dinner with speakers the day before (November 16th).
You can play in teams but only one person will receive the prize.